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Sound Waves Characteristics and Applications

CBSE · Class 9 · Science

Flashcards for Sound Waves Characteristics and Applications — CBSE Class 9 Science. Quick Q&A cards covering key concepts, definitions, and formulas.

77 questions80 flashcards5 concepts

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An illustration showing a block being pulled by a constant force F at an angle theta to the horizontal displacement S, with the formula W = F ⋅ S = FS cosθ.
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80 Flashcards
Card 1Production of Sound

Why is sound produced when a stretched rubber band is plucked?

Answer

Sound is produced by vibrations. When the rubber band vibrates, it disturbs the surrounding air and creates sound. When the vibrations stop, the sound also stops.

Card 2ध्वनि का उत्पादन

जब एक खिंचे हुए रबर बैंड को झंकना पड़ता है तो ध्वनि क्यों उत्पन्न होती है?

Answer

ध्वनि कंपन से उत्पन्न होती है। रबर बैंड के कंपन करने पर उसके आसपास की हवा में कंपन होता है और ध्वनि उत्पन्न होती है। कंपन रुकने पर ध्वनि भी रुक जाती है।

Card 3ध्वनि का उत्पादन

कंपन क्या है?

Answer

कंपन किसी वस्तु की आवधिक आगे-पीछे की गति है। कई ध्वनि स्रोत, जैसे कि तार, झिल्ली और स्वर रज्जु, कंपन करके ध्वनि उत्पन्न करते हैं।

Card 4Production of Sound

What is vibration?

Answer

Vibration is the periodic to and fro motion of an object. Many sound sources, such as strings, membranes, and vocal cords, produce sound by vibrating.

Card 5Production of Sound

How do vocal cords produce sound in humans?

Answer

Vocal cords are tightly stretched muscular flaps inside the voice box or larynx. When they vibrate, they produce sound. In boys, the vocal cords lengthen and thicken during adolescence, which lowers t

Card 6ध्वनि का उत्पादन

मनुष्यों में स्वर रज्जु ध्वनि कैसे उत्पन्न करते हैं?

Answer

स्वर रज्जु (vocal cords) स्वरयंत्र या स्वरकोष के अन्दर की कड़ी तनी हुई पेशीय पट्टियाँ होती हैं। इनके कम्पन से ध्वनि उत्पन्न होती है। लड़कों में किशोरावस्था में स्वर रज्जु लम्बी और मोटी हो जाती है जिसस

Card 7ध्वनि का उत्पादन

ट्यूनिंग फोर्क क्या है और इसका उपयोग कैसे किया जाता है?

Answer

स्वरयंत्र (tuning fork) एक U आकार की धातु की छड़ होती है जिसका एक डंठल होता है। यह प्रायः इस्पात या अल्युमिनियम से बना होता है। इसके प्रोंग को एक रबर पैड पर मारा जाता है जिससे यह कंपन करता है और लगभग

Card 8Production of Sound

What is a tuning fork and how is it used?

Answer

A tuning fork is a U-shaped metal bar with a stem, usually made of steel or aluminium. Its prongs are struck on a rubber pad to make it vibrate and produce nearly single-frequency sound.

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Frequently Asked Questions

What are the important topics in Sound Waves Characteristics and Applications for CBSE Class 9 Science?
Sound Waves Characteristics and Applications covers several key topics that are frequently asked in CBSE Class 9 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Sound Waves Characteristics and Applications — CBSE Class 9 Science?
Understand the core concepts first, then work through the 77 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.
How many flashcards are available for Sound Waves Characteristics and Applications?
There are 80 flashcards for Sound Waves Characteristics and Applications covering key definitions, formulas, and concepts. Use them daily for 10–15 minutes for best results.

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